Hey, thanks for the IPC Certification stuff. I also have gone through these certifications and would like to suggest BEST Inc (https://ipctraining.com/) for getting the best training in IPC. They have experienced IPC trainers and also offer Mobile training facility as well. Also, one more training center is there near Illinois i.e EPTAC Training Center(https://www.eptac.com/) which is in good competition with BEST Inc.
Out of these two, you can choose any.